首页|Influence of chemical composition on mechanical properties and energy absorption of CoNiFeCr high entropy alloys: A first-principles study

Influence of chemical composition on mechanical properties and energy absorption of CoNiFeCr high entropy alloys: A first-principles study

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  • NSTL
  • Elsevier
Metal matrix for the impact protection often requires high strength and good ductility as well as large energy absorption capacity. However, the traditional metal matrix alloys show relatively low strength and ductility to limit the energy absorption capacity. Here, the effect of chemical composition on properties of CoxNi50-xFe25Cr25 high entropy alloys is studied using first-principal calculations. The integrated method considering the competitive relationship between the strength and ductility is proposed to evaluate the energy absorption capacity. The results show that CoNiFeCr HEA with high strength and good ductility exhibits the exceptional energy absorption capacity, where the specific strength and ductility are 889 kN m/kg and 0.99. This work gives a new light into the selection and evaluation of strong energy-absorbing alloys.

High entropy alloyStrengthDuctilityEnergy absorption capacityFirst-principal calculationsSTACKING-FAULT ENERGIESTHIN-WALLED TUBESCONSTITUENT ELEMENTSTI-6AL-4V ALLOYCOCRFENICAPABILITYTRANSFORMATIONDEFORMATIONPLASTICITYEVOLUTION

Lin, Huilong、Tong, Muyun、Wang, Hao、Lu, Nan、Fang, Qihong、Li, Jia

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Hunan Univ

2022

10.1016/j.physb.2022.414029

Physica

Physica

ISSN：0921-4526
年,卷(期)：2022.640
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